Weather in Rottnest Island, Perth, Australia in September

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Visiting Rottnest Island, Perth, Australia in September

The weather in September is marginally warmer than the previous month and temperatures continue to rise quickly into October. September has average maximum temperatures of 20°C (68°F) which is nice and warm and makes sunbathing pleasant on clear days. The sunshine percentage is 59% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.0 hours of sunshine per day. It is a good time for sunbathing in Rottnest Island.

September has total rainfall of 19.4cm (7.6inches) making it a bit rainy but with only moderate showers. There are 15.7 days with some rainfall so you can still enjoy the beach on the clear days.

Sea temperatures are a cold 17°C (62°F). September is too cold for swimming in Rottnest Island for any length of time, unless you have a wetsuit. The sea temperature in September is slightly cooler than the previous month.

September brings warmer weather and calmer seas to Rottnest Island. Swimming, sunbathing, snorkeling, and diving become more enjoyable during this month. The improving conditions also make it a great time for surfing, windsurfing, and kitesurfing, as the winds become more consistent and the water temperature begins to rise. Consider visiting Rottnest Island in the months of January, February, March, December, for the best beach weather. Also consider one of our other suggestions for September.

Can you sunbathe in Rottnest Island in September?

Yes, September is a good time for sunbathing in Rottnest Island.

September has average maximum temperatures of 20°C (68°F) which is nice and warm and makes sunbathing pleasant on clear days. The sunshine percentage is 59% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.0 hours of sunshine per day. September has total rainfall of 19.4cm (7.6inches) making it a bit rainy but with only moderate showers. There are 15.7 days with some rainfall so you can still enjoy the beach on the clear days.

More about September temperature and sunshine.

Can you swim in Rottnest Island in September?

No, September is too cold for swimming in Rottnest Island for any length of time, with the sea water at 17°C (62°F), unless you have a wetsuit.

More about September sea temperatures.

Is September a good time to holiday in Rottnest Island?

Yes, September is a good time for a holiday in Rottnest Island.

September has average maximum temperatures of 20°C (68°F) which is nice and warm and makes sunbathing pleasant on clear days. The sunshine percentage is 59% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.0 hours of sunshine per day. September has total rainfall of 19.4cm (7.6inches) making it a bit rainy but with only moderate showers. There are 15.7 days with some rainfall so you can still enjoy the beach on the clear days. It is a good time for sunbathing in Rottnest Island. Sea temperatures are a cold 17°C (62°F). September is too cold for swimming in Rottnest Island for any length of time, unless you have a wetsuit.

More about the September temperatures and sunshine.

Is Rottnest Island warm in September?

Yes, Rottnest Island is nice and warm and makes sunbathing pleasant on clear days in September.

The average maximum temperature in Rottnest Island in September is 20°C (68°F). The average maximum temperature is 19°C (67°) in the previous month and 24°C (75°F) in the next month.

The average temperature in Rottnest Island in September is 14°C (58°F). The average temperature is 14°C (56°F) in the previous month and 17°C (63°F) in the next month.

More info about the September temperatures and sunshine.

How sunny is Rottnest Island in September?

The average day light hours per day in Rottnest Island in September are 11.9. The sunshine percentage is 59% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.0 hours of sunshine per day.

More about September sunshine.

Crowds in Rottnest Island in September

As spring arrives in September, the weather on Rottnest Island starts to warm up, and visitor numbers begin to increase. The beach is still relatively quiet during this month, but there may be more people around on weekends and during the school holidays. There are no major public holidays or events in September, so the beach remains fairly uncrowded.

Temperature in Rottnest Island in September

The weather in September is marginally warmer than the previous month and temperatures continue to rise quickly into October. The average maximum temperature in Rottnest Island in September is 20°C (68°F). The average maximum temperature is 19°C (67°F) in the previous month and 24°C (75°F) in the next month.

The average temperature in Rottnest Island in September is 14°C (58°F). The average temperature is 14°C (56°F) in the previous month and 17°C (63°F) in the next month.

The average minimum temperature in Rottnest Island in September is 9°C (47°F). The minimum temperature is 8°C (46°F) in the previous month and 11°C (51°F) in the next month.

Sunshine in Rottnest Island in September

The days in September are longer than the previous month and the days continue to get slightly longer into October. September has slightly more hours of sunshine than the previous month and hours of sunshine continue to rise into October. During September the average day light hours are 11.9 per day in Rottnest Island. The sunshine percentage is 59% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.0 hours of sunshine per day.

The ultraviolet index in Rottnest Island in September is typically 7.5 during September. An ultraviolet index reading of 8 to 10 indicates a very high risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 15 minutes. Take extra precautions because unprotected skin and eyes will be damaged and can burn quickly. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.

Sea Temperature in Rottnest Island in September

The average sea water temperature in Rottnest Island in September is 16.6°C (61.9°F) which is cool for swimming, shorty wetsuit may help you extend your time in the water. The sea temperature in September is slightly cooler than the previous month.

Rainfall in Rottnest Island in September

September weather is much drier than the previous month and rainfall continues to drop markedly into October. September has a few more days of rain than the previous month. The average total rainfall in Rottnest Island in September is 19.4cm (7.6inches) and on average there are 15.7 rainy days in September making it a wet time to visit the beach.

Humidity in Rottnest Island in September

The maximum dew point (an indicator of humidity) in Rottnest Island in September is 11°C (53°F) which is very comfortable. The dew point is 11°C (52°F) in the previous month and 12°C (12°F) in the next month.

The average maximum relative humidity in Rottnest Island in September is typically 94.8%. The maximum relative humidity is 95.7% in the previous month and 91.3% in the next month.

The average relative humidity in Rottnest Island in September is typically 68.9%. The average relative humidity is 72.7% in the previous month and 62.2% in the next month.

Wind Speed in Rottnest Island in September

The average maximum wind speed in Rottnest Island in September is typically 31KM/H (19MPH). The average maximum wind speed is 28KM/H (18MPH) in the previous month and 32KM/H (20MPH) in the next month.

The average wind speed in Rottnest Island in September is typically 16KM/H (10MPH). The average wind speed is 14KM/H (9MPH) in the previous month and 16KM/H (10MPH) in the next month.

The average wind direction in Rottnest Island in September is from the West-Northwest.

Monthly Averages

Suggested Beaches in September

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